If you’re looking to try something different on your Galaxy Mega 6.3, XDA member deadman96385 just released an official Liquid Smooth ROM based on Android 4.4.2 KitKat. The build is reportedly stable, but nonetheless a beta, so proceed at your own risk.
This guide will walk you though the installation process. As always, Androidstray assumes no liability for the firmware installation.
Before Getting Started
Do not use this guide for any device other than the Galaxy Mega 6.3 (GT-19200 or 19205 model). Flashing this ROM onto any other device will most probably result in a bricked phone.
You must have your Galaxy Mega 6.3 rooted, with ClockworkMod installed. As always, you want to backup your device and charge it to at least 80 percent.
Finally, enable USB Debugging mode by navigating to Settings -> Developer Options.
Updating Galaxy Mega 6.3 to Android KitKat 4.4.2 via Liquid Smooth ROM
1) Download the Android 4.4.2 KitKat Liquid Smooth ROM, as well as the Google Apps package, which can be found here (I9200), here (I9205) and here.
2) Using your USB cable, connect your Galaxy Mega 6.3 to your computer.
3) Copy Liquid Smooth custom ROM and the Google Apps package to the root folder of your handset’s SD card. Do not extract either.
4) Boot your phone into Recovery mode by pressing the Volume Up, Home and Power buttons simultaneously until you see a Galaxy Mega 6.3 logo, then release all three to enter recovery mode.
5) Perform a factory reset by selecting “Wipe data/Factory reset.”
6) In CWM recovery, navigate to “Format system” in the Mounts and Storage submenu, and then press “Yes.” Next, navigate to the Advanced submenu and select “Wipe Dalvik Cache.” Select “Yes” when prompted.
7) Navigate to “Install Zip from SD card” and select the ROM downloaded earlier. After the ROM is installed, repeat this step to install Google Apps.
8) After the installation is complete, press “Go back” and then select “Reboot system now” to restart your phone. This may take some time.
9) After restarting, your Galaxy Mega 6.3 will officially be running Android 4.4.2 KitKat Liquid Smooth ROM. Kudos.